Internal Liquid Measurement and Monitoring System for a Three Phase Separator

ABSTRACT

The internal liquid measurement and monitoring system for a three phase separator allows the user to accurately and reliably calculate the volumetric flow rate of the liquids exiting the three phase separator. A differential pressure device is attached to where the extension fitting of each liquid inside of the three phase separator. The differential pressure device creates a differential pressure, which is conveyed to a sensor by means of a pair of sensing lines. The sensor relays the differential pressure reading to an RTU flow computer that calculates the volumetric flow rate of the liquid exiting the three phase separator. The calculation is then sent to a SCADA system, which allows the user to observe the volumetric flow rate in real time.

The current application claims a priority to the U.S. Provisional Patentapplication Ser. No. 61/319,517 filed on Mar. 31, 2010.

FIELD OF THE INVENTION

The present invention generally relates to the measurement andmonitoring of the oil and water produced from a three phase separator.The information provided by the present invention in addition to thetraditional gas measurement system generates the three phase measurementresults from well production.

BACKGROUND OF THE INVENTION

Traditional meters have had difficulties measuring the volumetric flowrate of liquids exiting a three phase separator. An inlet allows amixture of fluids to enter a three phase separator. The mixture offluids consists of two liquids and a gas. The gas is emptied out of thethree phase separator by a gas outlet. A dump valve siphons a liquid,such as water or oil, out of the three phase separator by extending thesiphon into the liquid with an extension fitting. The liquid is carriedaway from the three phase separator along a dump liquid line. Traditionmeters measure the volumetric flow rate of the liquid being carriedalong the dump liquid line.

Some traditional meters include differential pressure meters, positivedisplacement meters, velocity meters, and mass meters. Differentialpressure meters, also known as head meters, are installed on the dumpliquid lines outside of the three phase separator. Differential pressuremeters experience problems with gas in the dump liquid lines becausethese meters are not completely submerged in the liquid being measured.Gas bubbles form in the sensing lines of these meters and createinaccurate readings. Differential pressure meters need to becontinuously maintained by bleeding the gas bubbles from the sensinglines. Positive displacement meters have problems with installation,moving parts being damaged, accuracy, and reliability. Velocity metersundergo problems with installation, moving parts being damaged,accuracy, reliability, cost, conductivity of liquids, sensor coating,and noise interference. Mass meters experience problems withinstallation, cost, reliability, errors caused by gas pockets in theexiting liquids, noise interference, and intermittent slug errors.

Problems with the traditional meters are solved by an internal liquidmeasurement and monitoring system. A pressure differential device suchas a venturi tube is attached to the extension fitting, which submergesthe pressure differential device in the liquid being measured. Thesensing lines conveys the differential pressure to the sensor, whichsends the measurement to an RTU flow computer. The RTU flow computeruses the pressure differential reading to calculate the volumetric flowrate of the liquid exiting the three phase separator. The RTU flowcomputer sends the volumetric flow rate calculation to a SCADA system,which records the calculation. The volumetric flow rate calculations aremade in real time, and the SCADA system archives the calculations beingmade. This system has proven to be an accurate and reliable method tomeasure the volumetric flow rate through a dump valve, which allowsoperators to easily monitor and troubleshoot problems such as a leakingdump valve or a dump valve being stuck open.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates the present invention in its entirety with thesensing lines exiting the three phase separator through the inspectionplug hole.

FIG. 2 also illustrates the present invention in its entirety but withthe sensing lines exiting the three phase separator through the waterextension fitting and the oil extension fitting.

FIG. 3 is a magnified view of the water differential pressure device andthe oil differential pressure device.

FIG. 4 is a magnified view of the first sensor and the second sensor.

FIG. 5 is an enlarged view of the replacement fitting.

FIG. 6 is an enlarged view of the modified water extension fitting andthe modified oil extension fitting.

DETAIL DESCRIPTIONS OF THE INVENTION

All illustrations of the drawings are for the purpose of describingselected versions of the present invention and are not intended to limitthe scope of the present invention.

The present invention is an internal liquid measurement and monitoringsystem for a three separator. The three phase separator 1 is acylindrical vessel that separates a mixture into its constitute fluidswith a combination of pressure and gravity. In petroleum engineering, athree phase separator 1 is used to separate a mixture that consists ofgas 2, liquid water 3, and liquid oil 4. A water dump valve 5 emptiesthe liquid water 3 out of the three phase separator 1, and an oil dumpvalve 6 empties the liquid oil 4 out of the three phase separator 1. Thewater dump valve 5 and the oil dump valve 6 are both siphon liquid dumpvalves and are located on the top of the three phase separator 1. Thewater dump valve 5 empties the liquid water 3 out of the three phaseseparator 1 by penetrating the three phase separator 1 with a waterextension fitting 7, which attaches to the bottom of the water dumpvalve 5. The oil dump valve 6 empties the liquid oil 4 out of the threephase separator 1 by penetrating the three phase separator 1 with an oilextension fitting 9, which attaches to the bottom of the oil dump valve6. The water extension fitting 7 is a tube with a water dump valve body8 and the oil extension fitting 9 is a tube with an oil dump valve body10, both of which extend the siphon of the water dump valve 5 and thesiphon of the oil dump valve 6 into their respective liquids. The lengthof the water extension fitting 7 and the length of the oil extensionfitting 9 are determined by the vertical location of the liquid water 3and the liquid oil 4 in the three phase separator 1.

The method begins by creating a differential pressure in the liquidwater 3 and the liquid oil 4 as the liquid water 3 and the liquid oil 4flow out of the three phase separator 1 through the water dump valve 5and the oil dump valve 6. To create a differential pressure as theliquid water 3 production flows out of the three phase separator 1, awater differential pressure device 11 is attached to the water extensionfitting 7. Similarly, to create a differential pressure as the liquidoil 4 flows out of the three phase separator 1, an oil differentialpressure device 19 is attached the oil extension fitting 9. In thepreferred embodiment of the present invention, the water differentialpressure device 11 and the oil differential pressure device 19 areventuri tubes. The venturi tubes would allow the liquid water 3 and theliquid oil 4 to flow out of the three phase separator 1 relativelyunrestricted. In addition, the venturi tube remains accurate because itdoes not have any moving parts that require maintenance. The venturitube can be sized to measure the volumetric flow rate of any fluid.Other embodiments of the water pressure differential device and the oilpressure differential device include orifices, conical orifice plates,quadrant edge, orifice plates, segmental wedges, integral wedges, flowtubes, flow nozzles, pilot tubes, elbow meters, target meters, andvariable-area meters also known as rotameters.

The water differential pressure device 11 comprises of a water inlet 12,a high water pressure section 13, a high water pressure tap 14, a lowwater pressure section 15, a low water pressure tap 16, a water outlet17, and a first adhesive 18. The water inlet 12 allows the liquid water3 to enter the water differential pressure device 11. The water inlet 12leads the liquid water 3 into the high water pressure section 13, whichis followed by the low water pressure section 15. The high waterpressure tap 14 is positioned on high water pressure section 13, and thelow water pressure tap 16 is positioned on the low water pressuresection 15. The water outlet 17 leads the liquid water 3 out of thewater differential pressure device 11 and into the water extensionfitting 7, which is connected to the water outlet 17 by the firstadhesive 18. Likewise, the oil differential pressure device 19 comprisesof an oil inlet 20, a high oil pressure section 21, a high oil pressuretap 22, a low oil pressure section 23, a low oil pressure tap 24, an oiloutlet 25, and a second adhesive 26. The oil inlet 20 allows the liquidoil 4 to enter the oil differential pressure device 19. The oil inlet 20leads the liquid oil 4 into the high oil pressure section 21, which isfollowed by the low oil pressure section 23. The high oil pressure tap22 is positioned on high oil pressure section 21, and the low oilpressure tap 24 is positioned on the low oil pressure section 23. Theoil outlet 25 leads the liquid oil 4 out of the oil differentialpressure device 19 and into the oil extension fitting 9, which isconnected to the oil outlet 25 by the second adhesive 26. In both thewater differential pressure device 11 and the oil differential pressuredevice 19, the low water pressure section 15 and the low oil pressuresection 23 have a smaller cross section than the high water pressuresection 13 and the high oil pressure section 21. The smaller crosssection increases the line velocity of a fluid, which in turn decreasesthe static pressure of the fluid. The difference in pressure between thelarger cross section and the smaller cross section is known as thedifferential pressure.

In order to detect the differential pressure of the liquid water 3, ahigh water pressure sensing line 27 is attached to the high waterpressure section 13, and a low water pressure sensing line 30 isattached to the low water pressure section 15. The high water pressuresensing line 27 and the low water pressure sensing line 30 are tubesfilled with liquid water 3. The high water pressure sensing line 27comprises of a high water pressure device end 28 and a high waterpressure manifold end 29. The high water pressure device end 28 isconnected to the high water pressure tap 14, which allows the liquidwater 3 filling the high water pressure sensing line 27 to experiencethe higher static pressure. The low water pressure sensing line 30comprises of a low water pressure device end 31 and a low water pressuremanifold end 32. The low water pressure device end 31 is connected tothe low water pressure tap 16, which allows the liquid water 3 fillingthe low water pressure sensing line 30 to experience the lower staticpressure. The liquid water 3 within both the high water pressure sensingline 27 and the low water pressure sensing line 30 must be purged of allgas bubbles; otherwise the differential pressure of the liquid water 3in the water differential pressure device 11 will not be the same as thedifferential pressure of the liquid water 3 within the high waterpressure sensing line 27 and the low water pressure sensing line 30.

Similarly, in order to detect the differential pressure of the liquidoil 4, a high oil pressure sensing line 33 is attached to the high oilpressure section 21, and a low oil pressure sensing line 36 is attachedto the low oil pressure section 23. The high oil pressure sensing line33 and the low oil pressure sensing line 36 are tubes filled with liquidoil 4. The high oil pressure sensing line 33 comprises of a high oilpressure device end 34 and a high oil pressure manifold end 35. The highoil pressure device end 34 is connected to the high oil pressure tap 22,which allows the liquid oil 4 filling the high oil pressure sensing line33 to experience the higher static pressure. The low oil pressuresensing line 36 comprises of a low oil pressure device end 37 and a lowoil pressure manifold end 38. The low oil pressure device end 37 isconnected to the low oil pressure tap 24, which allows the liquid oil 4filling the low oil pressure sensing line 36 to experience the lowerstatic pressure. The liquid oil 4 within both the high oil pressuresensing line 33 and the low oil pressure sensing line 36 must be purgedof all gas bubbles; otherwise the differential pressure of the liquidoil 4 in the oil differential pressure device 19 will not be the same asthe differential pressure of the liquid oil 4 within the high oilpressure sensing line 33 and the low oil pressure sensing line 36. Inaddition, a plurality of shut-off valves 39 are located along the highwater pressure sensing line 27, the low water pressure sensing line 30,the high oil pressure sensing line 33, and the low oil pressure sensingline 36. The plurality of shut-off valves 39 close the sensing lines toprevent any liquid water 3 or liquid oil 4 from escaping the three phasewhen the system needs to be isolated for maintenance or repairs.

The high water pressure sensing line 27 and the low water pressuresensing line 30 must exit the three phase separator 1 before being ableto connect to a first manifold 58. Likewise, the high oil pressuresensing line 33 and the low oil pressure sensing line 36 must exit thethree phase separator 1 before being able to connect to a secondmanifold 62. A three phase separator exit can be crafted by twodifferent methods: an inspection plug hole method and an extensionfitting method. The inspection plug hole method requires a replacementfitting 41, which comprises of a high water pressure fitting hole 42, alow water pressure fitting hole 43, a high oil pressure fitting hole 44,and a low oil pressure fitting hole 44. The replacement fitting 41 isdesigned to replace an inspection plug which covers an inspection plughole 40 on the three phase separator 1. The high water pressure fittinghole 42 allows the high water pressure sensing line 27 to traversethrough the replacement fitting 41 and connect to the first manifold 58.The low water pressure fitting hole 43 allows the low water pressuresensing line 30 to traverse through the replacement fitting 41 andconnect to the first manifold 58. The high oil pressure fitting hole 44allows the high oil pressure sensing line 33 to traverse through thereplacement fitting 41 and connect to the second manifold 62. The lowoil pressure fitting hole 44 allows the low oil pressure sensing line 36to traverse through the replacement fitting 41 and connect to the secondmanifold 62. The replacement fitting 41 is hermetically sealed so thatnothing but the high water pressure sensing line 27, the low waterpressure sensing line 30, the high oil pressure sensing line 33, and thelow oil pressure sensing line 36 can pass through the inspection plughole 40 and exit the three phase separator 1.

The extension fitting method requires custom modifications to the waterextension fitting 7 and the oil extension fitting 9. For this method,the additional components associated with the water extension fitting 7include a high water pressure inside tube 46, a high water pressuretunnel 47, a high water pressure outside tube 48, a low water pressureinside tube 49, a low water pressure tunnel 50, and a low water pressureoutside tube 51. Both the high water pressure tunnel 47 and the lowwater pressure tunnel 50 are holes drilled through the water dump valvebody 8 and run parallel to the center axis of the water extensionfitting 7. The high water pressure inside tube 46 connects to the highwater pressure tap 14 at one end and the high water pressure tunnel 47at the other end. The high water pressure outside tube 48 engages thehigh water pressure tunnel 47 at one end and the first manifold 58 atthe other end. Together, the high water pressure inside tube 46, thehigh water pressure tunnel 47, and the high water pressure outside tube48 form the high water pressure sensing line 27 described above.Likewise, the low water pressure inside tube 49 connects to the lowwater pressure tap 16 at one end and the low water pressure tunnel 50 atthe other end. The low water pressure outside tube 51 engages the lowwater pressure tunnel 50 at one end and the first manifold 58 at theother end. Together, the low water pressure inside tube 49, the lowwater pressure tunnel 50, and the low water pressure outside tube 51form the low water pressure sensing line 30 described above.

Also for the extension fitting method, the additional componentsassociated with the oil extension fitting 9 include a high oil pressureinside tube 52, a high oil pressure tunnel 53, a high oil pressureoutside tube 54, a low oil pressure inside tube 55, a low oil pressuretunnel 56, and a low oil pressure outside tube 57. Both the high oilpressure tunnel 53 and the low oil pressure tunnel 56 are holes drilledthrough the oil dump valve body 10 and run parallel to the center axisof the oil extension fitting 9. The high oil pressure inside tube 52connects to the high oil pressure tap 22 at one end and the high oilpressure tunnel 53 at the other end. The high oil pressure outside tube54 engages the high oil pressure tunnel 53 at one end and the secondmanifold 62 at the other end. Together, the high oil pressure insidetube 52, the high oil pressure tunnel 53, and the high oil pressureoutside tube 54 form the high oil pressure sensing line 33 describedabove. Similarly, the low oil pressure inside tube 55 connects to thelow oil pressure tap 24 at one end and the low oil pressure tunnel 56 atthe other end. The low oil pressure outside tube 57 engages the low oilpressure tunnel 56 at one end and the second manifold 62 at the otherend. Together, the low oil pressure inside tube 55, the low oil pressuretunnel 56, and the low oil pressure outside tube 57 form the low oilpressure sensing line 36 described above.

The first manifold 58 connects the high water pressure sensing line 27and the low water pressure sensing line 30 to a first sensor 59, and thesecond manifold 62 connects the high oil pressure sensing line 33 andlow oil pressure sensing line 36 to a second sensor 63. The firstmanifold 58 and the second manifold 62 are used for the maintenance ofthe present invention. The first manifold 58 can shut down and isolateeither the high water pressure sensing line 27 or the low water pressuresensing line 30. The first manifold 58 can also be used to purge any gasbubbles inside the high water pressure sensing line 27 and the low waterpressure sensing line 30. Similarly, the second manifold 62 can shutdown and isolate either the high oil pressure sensing line 33 or the lowoil pressure sensing line 36. Also, the second manifold 62 can be usedto purge any gas bubbles from the high oil pressure sensing line 33 andthe low oil pressure sensing line 36.

The first sensor 59 is used to convert the physical quantity of staticpressure into a first electrical signal 60. The first electrical signal60 consists of a higher water static pressure reading, a lower waterstatic pressure reading, and a water differential pressure reading,which is the difference between the static pressure of the liquid water3 in the high water pressure sensing line 27 and the static pressure ofthe liquid water 3 in the low water pressure sensing line 30. Likewise,the second sensor 63 is used to convert the physical quantity of staticpressure into a second electrical signal 64. The second electricalsignal 64 consists of a higher oil static pressure reading, a lower oilstatic pressure reading, and an oil differential pressure reading, whichis the difference between the static pressure of the liquid oil 4 in thehigh oil pressure sensing line 33 and the static pressure of the liquidoil 4 in the low oil pressure sensing line 36. Both the first sensor 59and the second sensor 63 should be positioned below the lowest liquidlevel in the three phase separator 1 and positioned as close as possibleto the water differential pressure device 11 and the oil differentialpressure device 19. The positioning of the first sensor 59 and thesecond sensor 63 keep the high water pressure sensing line 27, the lowwater pressure sensing line 30, the high oil pressure sensing line 33,and low oil pressure sensing line 36 as short as possible, which reducesthe gauge line error. In the preferred embodiment, the first sensor 59and the second sensor 63 are differential multivariable transmitterscapable of reading static pressure, differential pressure, andtemperature. The static pressure, differential pressure, and temperaturereadings allow the user to calculate the production of a liquid in realtime. Any brand of differential multivariable transmitter can be used aslong as it meets the class 1, division 1, electrical safety regulationsand meets the real time calculation requirements of the ISO (1991) andthe ASME (1971).

The RTU (Remote Terminal Unit) flow computer 69 translates the firstelectrical signal 60 and the second electrical signal 64 into digitalvalues. The RTU flow computer 69 uses the digital value of the waterdifferential pressure reading to calculate the volumetric flow rate ofthe liquid water 3 through the water dump valve 5. Similarly, the RTUflow computer 69 uses the digital value of the oil differential pressurereading to calculate the volumetric flow rate of the liquid oil 4through the oil dump valve 6. The equation for the volumetric flow ratedepends on the design of the water differential pressure device 11 andthe design of the oil differential pressure device 19. In the preferredembodiment of the present invention, the volumetric flow rate through aventuri tube is

$Q_{v} = {{CA}_{throat}\sqrt{\frac{2\Delta \; p}{\rho \left( {1 - \beta^{4}} \right)}}}$

where Q_(v) is the volumetric flow rate, A_(throat) is thecross-sectional area of the low pressure section, Δp is differentialpressure, ρ is the flowing density of the liquid, and β is the ratiobetween the diameter of the low pressure section and the diameter of thehigh pressure section. The RTU flow computer 69 is connected to thefirst sensor 59 by a first electronic connection 61 and is connected tothe second sensor 63 by the second electronic connection 65.

In addition to the first sensor 59 and the second sensor 63, atemperature measuring device 66 is attached to the thermowell of thethree phase separator 1 in order to obtain a water temperature readingand an oil temperature reading. The temperature measuring device 66converts the water temperature reading and the oil temperature into athird electrical signal 67. The temperature measuring device 66 sendsthe third electrical signal 67 along a third electronic connection 68 tothe RTU flow computer 69. The RTU flow computer 69 changes the thirdelectrical signal 67 into a digital value for the water temperature anda digital value for the oil temperature. The temperature and pressurevalues are used to calculate the density changes in the liquid water 3in real time and the density changes in the oil 4 in real time becausethe volumetric flow rate depends on the density of the flowing liquid.In the preferred embodiment, the temperature measuring device 66 is anRID (Resistive Thermal Device).

Finally, the RTU flow computer 69 exchanges information with a SCADA(Supervisory control and data acquisition) system 71 by a data transferconnection 70. In the preferred embodiment, the data transfer connection70 is either a 232 communication link or a 485 communication link. TheSCADA system 71 is an industrial computer control system used to monitorthe three phase separator 1.

For the maintenance of the present invention, the startup procedureshall begin after all components have been properly installed andprogrammed to complete the real time liquid measurement calculations.All safety and maintenance procedures are important to follow in orderto protect all personnel and the equipment involved in the method. Thesafety and maintenance procedures should include an isolation of theequipment procedure, a lock out or tag out procedure.

In the preferred embodiment, the multivariable differential transmitterscould be dry calibrated to their prospective full scale values forstatic pressure, differential pressure, and temperature ranges. Themultivariable differential transmitters can be left out of thepressurized service until the liquid levels are properly set and theliquid levels remain balanced in the upper sight glass of the threephase separator 1.

Level control is accomplished by priming the three phase separator 1 sothat the three phase separator 1 has a separate liquid water level and aseparate liquid oil level in the control boxes. The float level controlsare properly adjusted to maintain the liquid water level and the oillevel. The multivariable differential transmitters can be pressurizedand put into service after the liquid water level and the liquid oillevel are set.

The high water pressure sensing line 27, the low water pressure sensingline 30, the high oil pressure sensing line 33, and the low oil pressuresensing line 36 must be purged of any gas bubbles so that themeasurements are made only on the liquid water 3 and the liquid oil 4.Any gases left in the sensing lines will cause measurement errors.

The zero under pressure calibration is the last part of the safety andmaintenance procedures. The multivariable differential transmitters mustbe in service with the sensing lines completely open and with the threephase separator 1 in a no flow condition. The three phase separator'sdownstream dump valve must be closed in a no leak condition. Themultivariable differential transmitters are then calibrated to zerounder pressure. The zero under pressure calibration has to be preformedto compensate for the head pressure difference between the sensing tubesand the differential pressure devices.

Although the invention has been explained in relation to its preferredembodiment, it is to be understood that many other possiblemodifications and variations can be made without departing from thespirit and scope of the invention as hereinafter claimed.

1. An internal liquid measurement and monitoring system for a threephase separator comprises of a three phase separator; a water dumpvalve; a water extension fitting; an oil dump valve; an oil extensionfitting; a water differential pressure device; a first adhesive; an oildifferential pressure device; a second adhesive; a high water pressuresensing line; a low water pressure sensing line; a high oil pressuresensing line; a low oil pressure sensing line; an inspection plug hole;a replacement fitting; a plurality of shut-off valves; a first manifold;a first sensor; a first electronic connection; a second manifold; asecond sensor; a second electronic connection; a temperature measuringdevice; a third electronic connection; an RTU flow computer; a datatransfer connection; a SCADA system; said water differential pressuredevice comprises of a water inlet, a high water pressure section, a highwater pressure tap, a low water pressure section, a low water pressuretap, and a water outlet; said oil differential pressure device comprisesof an oil inlet, a high oil pressure section, a high oil pressure tap, alow oil pressure section, a low oil pressure tap, and an oil outlet;said high water pressure sensing line comprises of a high water pressuredevice end and a high water pressure manifold end; said low waterpressure sensing line comprises of a low water pressure device end and alow water pressure manifold end; said high oil pressure sensing linecomprises of a high oil pressure device end and a high oil pressuremanifold end; said low oil pressure sensing line comprises of a low oilpressure device end and a low oil pressure manifold end; and saidreplacement fitting comprises of a high water pressure fitting hole, alow water pressure fitting hole, a high oil pressure fitting hole, and alow oil pressure fitting hole.
 2. Said internal liquid measurement andmonitoring system for a three phase separator as claimed in claim 1comprises of said three phase separator being penetrated by said waterextension fitting; said water dump valve being attached atop said waterextension fitting with a water dump valve body; said water differentialpressure device being attached below said water extension fitting; saidwater differential pressure device being located inside of said threephase separator; said three phase separator being penetrated by said oilextension fitting; said oil dump valve being attached atop said oilextension fitting with an oil dump valve body; said oil differentialpressure device being attached below said oil extension tilting; andsaid oil differential pressure device being located inside of said threephase separator.
 3. Said internal liquid measurement and monitoringsystem for a three phase separator as claimed in claim 1 comprises ofsaid water inlet, said high water pressure section, said low waterpressure section, and said water outlet being connected collinearly;said high water pressure tap being positioned on said high waterpressure section; said low water pressure tap being positioned on saidlow water pressure section; said water outlet being connected to saidwater extension fitting by said first adhesive; said oil inlet, saidhigh oil pressure section, said low oil pressure section, and said oiloutlet being connected collinearly; said high oil pressure tap beingpositioned on said high oil pressure section; said low oil pressure tapbeing positioned on said low oil pressure section; and said oil outletbeing connected to said oil extension fitting by said second adhesive.4. Said internal liquid measurement and monitoring system for a threephase separator as claimed in claim 1 comprises of said inspection plughole being positioned on said three phase separator; said replacementfitting being positioned into said inspection plug hole; said high waterpressure device end being attached to said high water pressure tap; saidlow water pressure device end being attached to said low water pressuretap; said high oil pressure device end being attached to said high oilpressure tap; said low oil pressure device end being attached to saidlow oil pressure tap; said high water pressure fitting hole beingtraversed through by said high water pressure sensing line; said lowwater pressure fitting hole being traversed through by said low waterpressure sensing line; said high oil pressure fitting hole beingtraversed through by said high oil pressure sensing line; said low oilpressure fitting hole being traversed through by said low oil pressuresensing line; said plurality of shut-off valves being attached alongsaid high water pressure sensing tube, said low water pressure sensingtube, said high oil pressure sensing tube, and said low oil pressuresensing tube; said plurality of shut-off valves being attached adjacentto said replacement fitting; said high water pressure manifold end beingattached to said first manifold; said low water pressure manifold endbeing attached to said first manifold; said high oil pressure manifoldend being attached to said second manifold; said low oil pressuremanifold end being attached to said second manifold; said first manifoldbeing attached to said first sensor; said second manifold being attachedto said second sensor; and said temperature measuring device beingattached to three phase separator.
 5. Said internal liquid measurementand monitoring system for a three phase separator as claimed in claim 1comprises of said first sensor being connected to said RTU flow computerby said first electronic connection; said second sensor being connectedto said RTU flow computer by said second electronic connection; and saidtemperature measuring device being connected to said RTU flow computerby said third connection.
 6. Said internal liquid measurement andmonitoring system for a three phase separator as claimed in claim 1comprises of said RTU flow computer being connected to said SCADA systemby said data transfer connection.
 7. An internal liquid measurement andmonitoring system for a three phase separator comprises of a three phaseseparator; a water dump valve; a water extension fitting; an oil dumpvalve; an oil extension fitting; a water differential pressure device; afirst adhesive; an oil differential pressure device; a second adhesive;a high water pressure inside tube; a high water pressure tunnel; a highwater pressure outside tube; a low water pressure inside tube; a lowwater pressure tunnel; a low water pressure outside tube; a high oilpressure inside tube; a high oil pressure tunnel; a high oil pressureoutside tube; a low oil pressure inside tube; a low oil pressure tunnel;a low oil pressure outside tube; a plurality of shut-off valves; a firstmanifold; a first sensor; a first electronic connection; a secondmanifold; a second sensor; a second electronic connection; a temperaturemeasuring device; a third electronic connection; an RTU flow computer; adata transfer connection; a SCADA system; said water differentialpressure device comprises of a water inlet, a high water pressuresection, a high water pressure tap, a low water pressure section, a lowwater pressure tap, and a water outlet; and said oil differentialpressure device comprises of an oil inlet, a high oil pressure section,a high oil pressure tap, a low oil pressure section, a low oil pressuretap, and an oil outlet.
 8. Said internal liquid measurement andmonitoring system for a three phase separator as claimed in claim 7comprises of said three phase separator being penetrated by said waterextension fitting with a water dump valve body; said water dump valvebeing attached atop said water extension fitting; said waterdifferential pressure device being attached below said water extensionfitting; said water differential pressure device being located inside ofsaid three phase separator; said three phase separator being penetratedby said oil extension fitting; said oil dump valve being attached atopsaid oil extension fitting with an oil dump valve body; said oildifferential pressure device being attached below said oil extensionfitting; and said oil differential pressure device being located insideof said three phase separator.
 9. Said internal liquid measurement andmonitoring system for a three phase separator as claimed in claim 7comprises of said water inlet, said high water pressure section, saidlow water pressure section, and said water outlet being connectedcollinearly; said high water pressure tap being positioned on said highwater pressure section; said low water pressure tap being positioned onsaid low water pressure section; said water outlet being connected tosaid water extension fitting by said first adhesive; said oil inlet,said high oil pressure section, said low oil pressure section, and saidoil outlet being connected collinearly; said high oil pressure tap beingpositioned on said high oil pressure section; said low oil pressure tapbeing positioned on said low oil pressure section; and said oil outletbeing connected to said oil extension fitting by said second adhesive.10. Said internal liquid measurement and monitoring system for a threephase separator as claimed in claim 7 comprises of said high waterpressure inside tube being located inside said three phase separator;said low water pressure inside tube being located inside said threephase separator; said high oil pressure inside tube being located insidesaid three phase separator; said low oil pressure inside tube beinglocated inside said three phase separator; said high water pressuretunnel being traversed through said water dump valve body; said lowwater pressure tunnel being traversed through said water dump valvebody; said high oil pressure tunnel being traversed through said oildump valve body; said low oil pressure tunnel being traversed throughsaid oil dump valve body; said high water pressure outside tube beinglocated outside said three phase separator; said low water pressureoutside tube being located outside said three phase separator; said highoil pressure outside tube being located outside said three phaseseparator; said low oil pressure outside tube being located outside saidthree phase separator; said high water pressure inside tube, said highwater pressure tunnel, and said high water pressure outside tube beingconnected inline; said low water pressure inside tube, said low waterpressure tunnel, and said low water pressure outside tube beingconnected inline; said high oil pressure inside tube, said high oilpressure tunnel, and said high oil pressure outside tube being connectedinline; said low oil pressure inside tube, said low oil pressure tunnel,and said low oil pressure outside tube being connected inline; a highwater pressure sensing line being defined by said high water pressureinside tube, said high water pressure tunnel, and said high waterpressure outside; a low water pressure sensing line being defined bysaid low water pressure inside tube, said low water pressure tunnel, andsaid low water pressure outside; a high oil pressure sensing line beingdefined by said high oil pressure inside tube, said high oil pressuretunnel, and said high oil pressure outside; a low oil pressure sensingline being defined by said low oil pressure inside tube, said low oilpressure tunnel, and said low oil pressure outside; said high waterpressure sensing line comprises of a high water pressure device end anda high water pressure manifold end; said low water pressure sensing linecomprises of a low water pressure device end and a low water pressuremanifold end; said high oil pressure sensing line comprises of a highoil pressure device end and a high oil pressure manifold end; said lowoil pressure sensing line comprises of a low oil pressure device end anda low oil pressure manifold end; said high water pressure device endbeing attached to said high water pressure tap; said low water pressuredevice end being attached to said low water pressure tap; said high oilpressure device end being attached to said high oil pressure tap; saidlow oil pressure device end being attached to said low oil pressure tap;said high water pressure manifold end being attached to said firstmanifold; said low water pressure manifold end being attached to saidfirst manifold; said high oil pressure manifold end being attached tosaid second manifold; said low oil pressure manifold end being attachedto said second manifold; said plurality of shut-off valves beingattached along said high water pressure sensing tube, said low waterpressure sensing tube, said high oil pressure sensing tube, and said lowoil pressure sensing tube; said plurality of shut-off valves beingattached adjacent to said water dump valve body and said oil dump valvebody; said first manifold being attached to said first sensor; saidsecond manifold being attached to said second sensor; and saidtemperature measuring device being attached to three phase separator.11. Said internal liquid measurement and monitoring system for a threephase separator as claimed in claim 7 comprises of said first sensorbeing connected to said RTU flow computer by said first electronicconnection; said second sensor being connected to said RTU flow computerby said second electronic connection; and said temperature measuringdevice being connected to said RTU flow computer by said thirdconnection.
 12. Said internal liquid measurement and monitoring systemfor a three phase separator as claimed in claim 7 comprises of said RTUflow computer being connected to said SCADA system by said data transferconnection.
 13. A method of using the internal liquid measurement andmonitoring system for a three phase separator to accurately measure thevolumetric flow rate of the liquid water and the volumetric flow rate ofthe liquid oil exiting the three phase separator comprises, providing athree phase separator, a water dump valve, an oil dump valve, a waterextension fitting, an oil extension fitting, a water differentialpressure device, a oil differential pressure device, a high waterpressure sensing line, a low water pressure sensing line, a high oilpressure sensing line, a low oil pressure sensing line, a first sensor,a first electrical signal, a first electronic connection, a secondsensor, a second electrical signal, a second electronic connection, atemperature measuring device, a third electrical signal, a thirdelectronic connection, an RTU flow computer, a data transfer connection,and a SCADA system; providing a gas, a liquid water, and a liquid oilstored inside said three phase separator; providing a water inlet, ahigh water pressure section, a high water pressure tap, a low waterpressure section, a low water pressure tap, and a water outlet by saidwater differential pressure device; providing an oil inlet, a high oilpressure section, a high oil pressure tap, a low oil pressure section, alow oil pressure tap, and an oil outlet by said oil differentialpressure device; extending of said water extension fitting into theliquid water; and extending of said oil extension fitting into theliquid oil.
 14. Said method of using the internal liquid measurement andmonitoring system for a three phase separator to accurately measure thevolumetric flow rate of the liquid water and the volumetric flow rate ofthe liquid oil exiting the three phase separator as claimed in claim 13comprises, wherein said water dump valve is a siphon and the waterextension fitting extends said siphon into said liquid water; siphoningof said liquid water by said water dump valve resulting in said liquidwater flowing through said water differential pressure device; enteringof said liquid water flowing into said water differential pressuredevice through said water inlet; entering of said liquid water into saidhigh water pressure section resulting in a higher static pressure insaid liquid water flowing through said high water pressure section,wherein said liquid water flowing through high water pressure sectionallows said liquid water inside said high water pressure sensing line toperceive higher static pressure by means of said high water pressuretap; entering of said liquid water into said low water pressure sectionresulting in a lower static pressure in said liquid water flowingthrough said low water pressure section, wherein said liquid waterflowing through low water pressure section allows said liquid waterinside said low water pressure sensing line to perceive lower staticpressure by means of said low water pressure tap; measuring of higherstatic pressure of said liquid water inside said high water pressuresensing line and lower static pressure of said liquid water inside saidlow water pressure sensing line by means of said first sensor; andexiting of said liquid water flowing out of said water differentialpressure device through said water outlet into said water extensionfitting.
 15. Said method of using the internal liquid measurement andmonitoring system for a three phase separator to accurately measure thevolumetric flow rate of the liquid water and the volumetric flow rate ofthe liquid oil exiting the three phase separator as claimed in claim 13comprises, wherein said oil dump valve is a siphon and the oil extensionfitting extends said siphon into said liquid oil; siphoning of saidliquid oil by said oil dump valve resulting in said liquid oil flowingthrough said oil differential pressure device; entering of said liquidoil flowing into said oil differential pressure device through said oilinlet; entering of said liquid oil into said high oil pressure sectionresulting in a higher static pressure in said liquid oil flowing throughsaid high oil pressure section, wherein said liquid oil flowing throughhigh oil pressure section allows said liquid oil inside said high oilpressure sensing line to perceive higher static pressure by means ofsaid high oil pressure tap; entering of said liquid oil into said lowoil pressure section resulting in a lower static pressure in said liquidoil flowing through said low oil pressure section, wherein said liquidoil flowing through low oil pressure section allows said liquid oilinside said low oil pressure sensing line to perceive lower staticpressure by means of said low oil pressure tap; measuring of higherstatic pressure of said liquid oil inside said high oil pressure sensingline and lower static pressure of said liquid oil inside said low oilpressure sensing line by means of said first sensor; and exiting of saidliquid oil flowing out of said oil differential pressure device throughsaid oil outlet into said oil extension fitting.
 16. Said method ofusing the internal liquid measurement and monitoring system for a threephase separator to accurately measure the volumetric flow rate of theliquid water and the volumetric flow rate of the liquid oil exiting thethree phase separator as claimed in claim 13 comprises, measuring oftemperature of said liquid water and temperature of said liquid oilwithin said three phase separator by means of said temperature measuringdevice.
 17. Said method of using the internal liquid measurement andmonitoring system for a three phase separator to accurately measure thevolumetric flow rate of the liquid water and the volumetric flow rate ofthe liquid oil exiting the three phase separator as claimed in claim 13comprises, sending of said first electrical signal along said firstelectronic connection to said RTU flow computer by means of said firstsensor; wherein said first electrical signal contains higher staticpressure reading of said liquid water, lower static pressure reading ofsaid liquid water, and differential pressure reading of said liquidwater; sending of said second electrical signal along said secondelectronic connection to said RTU flow computer by means of said secondsensor; wherein said second electrical signal contains higher staticpressure reading of said liquid oil, lower static pressure reading ofsaid liquid oil, and differential pressure reading of said liquid oil;sending of said third electrical signal along said third electronicconnection to said RTU flow computer by means of said temperaturemeasuring device; and wherein third electrical signal containstemperature reading of said liquid water and temperature reading of saidliquid oil.
 18. Said method of using the internal liquid measurement andmonitoring system for a three phase separator to accurately measure thevolumetric flow rate of the liquid water and the volumetric flow rate ofthe liquid oil exiting the three phase separator as claimed in claim 13comprises, calculating volumetric flow rate of said liquid water throughsaid water differential pressure device with said first electricalsignal by means of said RTU computer determining how much of said liquidwater is being produced by said three phase separator; whereinvolumetric flow rate of said liquid water depends on density of liquidwater; wherein density of liquid water depends on temperature of saidliquid water inside of said three phase separator; calculating densityof said liquid water in said three phase separator with said thirdelectrical signal by means of said RTU flow computer; calculatingvolumetric flow rate of said liquid oil through said oil differentialpressure device with said second electrical signal by means of said RTUflow computer determining how much of said liquid oil is being producedby said three phase separator; wherein volumetric flow rate of saidliquid oil depends on density of liquid oil; wherein density of liquidoil depends on temperature of said liquid oil inside of said three phaseseparator; and calculating density of said liquid oil in said threephase separator with said third electrical signal by means of said RTUflow computer.
 19. Said method of using the internal liquid measurementand monitoring system for a three phase separator to accurately measurethe volumetric flow rate of the liquid water and the volumetric flowrate of the liquid oil exiting the three phase separator as claimed inclaim 13 comprises, sending volumetric flow rate of said liquid waterand volumetric flow rate of said liquid oil from said RTU flow computerto said SCADA system by means of said data transfer connection.